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CVE-2016-0771: tests/dns: restore formerly segfaulting test

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This was on the client side, due the a strlen(NULL) on the previously
DOS-encoded TXT field. With a new IDL structure, this segfault no longer exists.
Note that both Samba and Windows return NXRRSET instead of FORMERR.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=11128
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11686

Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Garming Sam
2015-12-15 17:22:32 +13:00
committed by Stefan Metzmacher
parent 866bf51758
commit 5b10cc25be
1 changed files with 25 additions and 26 deletions
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51
python/samba/tests/dns.py
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@ -387,32 +387,31 @@ class TestDNSUpdates(DNSTest):
# request is formatted.
pass
# I'd love to test this one, but it segfaults. :)
# def test_update_prereq_with_non_null_length(self):
# "test update with a non-null length"
# p = self.make_name_packet(dns.DNS_OPCODE_UPDATE)
# updates = []
#
# name = self.get_dns_domain()
#
# u = self.make_name_question(name, dns.DNS_QTYPE_SOA, dns.DNS_QCLASS_IN)
# updates.append(u)
# self.finish_name_packet(p, updates)
#
# prereqs = []
# r = dns.res_rec()
# r.name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
# r.rr_type = dns.DNS_QTYPE_TXT
# r.rr_class = dns.DNS_QCLASS_ANY
# r.ttl = 0
# r.length = 1
# prereqs.append(r)
#
# p.ancount = len(prereqs)
# p.answers = prereqs
#
# response = self.dns_transaction_udp(p)
# self.assert_dns_rcode_equals(response, dns.DNS_RCODE_FORMERR)
def test_update_prereq_with_non_null_length(self):
"test update with a non-null length"
p = self.make_name_packet(dns.DNS_OPCODE_UPDATE)
updates = []
name = self.get_dns_domain()
u = self.make_name_question(name, dns.DNS_QTYPE_SOA, dns.DNS_QCLASS_IN)
updates.append(u)
self.finish_name_packet(p, updates)
prereqs = []
r = dns.res_rec()
r.name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
r.rr_type = dns.DNS_QTYPE_TXT
r.rr_class = dns.DNS_QCLASS_ANY
r.ttl = 0
r.length = 1
prereqs.append(r)
p.ancount = len(prereqs)
p.answers = prereqs
response = self.dns_transaction_udp(p)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_FORMERR)
def test_update_prereq_nonexisting_name(self):
"test update with a nonexisting name"